ManaFoundry is a free Commander deck-building tool designed to help Magic: The Gathering players create complete EDH decks with less manual effort. Choose a commander, and the builder assembles a deck in one click, using EDHREC data to guide its recommendations. Players can tailor their results with controls for budget, deck bracket, and cards in their collection, making it easier to shape a list around their preferences and available cards.

The site also features additional tools and resources, including Foundry Inspector, SpellChroma, deck lists, and collection management. Card data is provided by Scryfall, and the service is inspired by EDHREC. ManaFoundry is an unofficial fan project and is not approved or endorsed by Wizards of the Coast; its fan content is presented under the Wizards Fan Content Policy. The site also offers ways to support its work through Patreon and to send feedback. Some card purchase links use TCGplayer affiliate tracking, which may earn ManaFoundry a commission without adding cost for the buyer.